Hi Tony, again > > The issue I have with that it does not then follow the binding doc :) > > > > See this part in Documentation/devicetree/bindings/graph.txt: > > > > "If a single port is connected to more than one remote device, an > > 'endpoint' child node must be provided for each link." My understanding is that 1 "port" is for 1 "physical interface". In sound case, it is 1 "DAI". And, 1 "endpoint" is for 1 "connection". "If a single port is connected to more than one remote device, an 'endpoint' child node must be provided for each link." This meanns, "If 1 DAI (*1) is connected to multiple remote DAIs(*2), this connection is indicated by multiple "endpoint"" or something like that. (*2) DAIA-endpoint---endpoint--\ DAIB-endpoint---endpoint-----DAI (*1) DAIC-endpoint---endpoint--/ > > Isn't the I2C TDM case the same as "single port connecected to > > more than one remote device" rather than multiple ports? I re-checked https://lkml.org/lkml/2018/3/28/405. Are MDM6600 / OMAP4 CPU portion, and are CPCAP / WL1285 Codec portion ? Then, it is not yet supported (on ALSA SoC level?). If my memory was correct, Lars-Peter had some idea for Mux, But, not yet implemented I think. audio-graph[-scu] / simple-card[-scu] are supporting DPCM, but it is for multiple CPU - single Codec. Best regards --- Kuninori Morimoto
